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The distance to a star is known if we know its
Fossil Record
The collection of fossils, which provides evidence about the history of life and past environments on Earth.
Evolution
is the process by which different kinds of living organisms have developed and diversified from earlier forms during the history of the earth.
Ancient Species
A term usually referring to species that have existed on Earth for a very long time and may either be extinct or have modern descendants.
Laurasia
Laurasia refers to the northernmost of two supercontinents (the other being Gondwana) that formed part of the Pangaea supercontinent in late Paleozoic and early Mesozoic times.
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